Home / 21,969.10-30,317.10-11,897.35

Finding the Fourth Proportional to 21,969.10, 30,317.10 and 11,897.35

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Solution

The fourth proportional to 21,969.10, 30,317.10 and 11,897.35 is: 16,418.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.10 : 30,317.10 = 11,897.35 : x
  2. Step 2: Convert to fraction form
    21,969.10/30,317.10 = 11,897.35/x
  3. Step 3: Cross multiply
    21,969.10x = 30,317.10 × 11,897.35
  4. Step 4: Simplify right side
    21,969.10x = 360,693,149.69
  5. Step 5: Solve for x
    x = 360,693,149.69/21,969.10
  6. Step 6: Final answer
    x = 16,418.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.